Coleman Quickbed with MP3 speakers and Built-In 4D Pump (Twin) Twin-sized inflatable mattress ideal for camping or accommodating guests Built-in amplifier and pair of speakers for listening to iPod or MP3 player Hands-free 4D QuickPump automatically inflates and deflates mattress Double lock valve locks in air 2 ways; durable, heavy-duty PVC construction Measures 74 x 9 x 40 inches (W x H x D); supports up to 600 pounds